Improvement



z SheetsShet1.

GnGROMPTON. DEVICES FOR FINDING THE TRUE SHED IN LOOMS.

Patented. F'eb.15,1876

2 Sheets-Sheet 2.

- G. CROMPTON. DEVICES FOR FINDING THE TRUE SHED IN No.173.'594. Patented. Feb. 15. 1876.'

NPETERSI FHOTD-LITHOGRAPHER, WASHINGTON. D, Q

stopped automatically.

' GEORGE OROMPTON, or wonon s'rnn, MASSACHUSETTS.

" lMPROVEMENTfl'N'D'EVI CES FOR FINDINGTHETRUE SHED m Looms.

S pecification forming part of Letters Patent No. 173.594, dated February 15, 1876 application filed October 26, 1875.

Too/ll whom it mayconcern:

proved Loom, of which the following is a specification: 1

In weaving, whentheshuttlethread breaks or runs out, or an imperfection in weaving occurs, it often happens that the crank-shaft and pattern devices continue to move and make one or more sheds before the loom can be stopped,

and then the pattern orthe pattern and shuttlebox mechanismsare turned back until the true shed is formed, so thatthe shuttle-thread may be mended or replaced in the true shed, to con-.

tinue the patternpro'perly. This has been done i both by hand and by power.

. This invention relatesto a simple mechanism for finding the true-shed. The true shed .lnay be found by allowing the loom to run forward as usual, and when found the-loom is This invention consists in a new method of finding and indicating a true shed, or the shed in which a certain weft was woven, and for this purpose I employ a fork adapted to be inserted behind the weft last woven across the Warp, or between a last-woven pick or weft extending across the warps and an adjacent weft constituting a part of the properly-woven fabric. .The fork rests against the weft, in front of it, so long as that weft is held by crossed warps; but when the true shed, or one corresponding with the shed' in which the weft in front of the fork was laid, is reached, the weft nolonger being held by crossed warps, the fork is pressed forward and the weft isthrown forward into the open shed. With a fork adapted to operate in this wayI have connected devices for releasing the shipper-lever, which, through the action of any well-known devices,

, will stop the loom.

Figure 1 is a longitudinal section of a loom embodying my invention. Fig. 2 is a front view of the breast-beam and the parts carried by it. Fig. 3 is a top view, showing the operation of the fork when being used to find a true shed; and Fig. 4, a view of the shipper-lever connection on the under side of the breastbeam. v

The loom-frame a, and lay b are of any suitable or known construction. Connected with the breast-bea'm c, or with the support d thereon, is a lever, 0, connected at one end, through a link, f, with a pivoted vertical lever, g, having a tendency, by the action of a weight, k, or by a spring, to movelat its lower end toward the lay b. means of a loop, 2, or fingers or projections, with aradius-bar, j, connected at its upper end with a pivoted arm, It. The end of the lever e toward the center of the breast-beam is connected with the shank of and adapted to move the shed-finding fork. This shed-finding fork consists of a shank, l, and an arm, m,with

teeth r-oneor more-the shank I being suitably-guided in this instance by the stand 0 projecting from the support d. The stand 0 has a projection, 19, and near its lower end is a- 'iassage, q,,for-the reception of the head 1' of the fork, when the latter is held by the support and stand out of operation. I In this instance-the arm m of the fork is pivoted so that it may be turned back in the direction of the arrow, when the head renters slot q, and in such position the lever c, Fig. 3, holds back the lower end of the weighted lever g, (see Fig. 1,) which, through its connection, holds the radius-barj back in such position that the end .9 of vibrating lever t, actuated bya cam, a, on the crank-shaft, cannot engage j, and arm It will remain down. Pivoted to the lay is a dagger, w. It projects forward toward the breastbeam, and, when not lifted positively by the lever it, (put in operation by the lever t,through the radius-barj,) the dagger will pass under the releasing-bar U of the shipper-handle w. The guide in which the Shipperhandle to works is a bracket, 2, provided with a shipper-holding notch,a', and under the guide is a pivoted finger, b adapted at one end to meet the releasing-bar, so that the latter, when moved by the. dagger x, will release the shipper-handle from its holding-notch a. operating regularly the arm m of the fork is folded back, so that the head 1" is caught and held in the notch q, and the levers e g are held in the dotted position shown in Figs. 1 and 3, the end of the radius-bar being out of the path of the end 8 of vibrating lever it.

Should a weft break or run out, it is necessary, in order to preserve the pattern, to insert PATENT owl-eh. I

This lever g is connected, by,

When theloom is r new the mended or renewed weft in the shed where the fault occurred; andto find the true shed, which may have been changed several times, the fork is turned over to the position shown in Figs. 1 and 3, and the tines n are inserted between the broken weft b and the adjacent weft, or the broken weft may be removed, and

'- lines, Fig. 1.

The lay continues to operate all as-usual, and the reed beats this filling up at each stroke and confines the tines at between the two ad jacent wefts. The weft, acting againstthese tines, holds the fork back so long as sheds are formed in which crossing-warps hold the weft, but when the true shed is reached the weft, being no longer held, will allow the fork to I move forward under the action of the weight h or a spring, and this movement will push the weft out into the open shed, and at the same time the radius-barj will be moved forward. At this time the parts will be as rep resented in full lines, Figs. 1 and 2, and the movement of lever 73 will raise bar-j and bar k, so that, as the lay moves forward, the dagger as will he lifted and will engage the releas-' ing-lever v and stop the loom. This fork would operate equally as well wit a loom having its motions reversed and run backward to find a true shed rather than run forward, as herein described; but I prefer to run the 100111 forward. I A shipper-handle is placed at each side of the loom,and they are connected, as usual, by

a forked rod.. I may hold this fork to operate in the manner described by other means than the holder shown.

This shed-finding fork is not to be used as an ordinary weft-fork; is brought into action only when it is desired to find a true shed; at

all other times it being held out of action.

I claim- 1. The method of finding and indicating a true shed in a warp being woven, substantially asdeseribed, which consists in holding the weft last laid or woven pressed forward in opposition to the blows of the reed, by means of a fork that presses against the weft, as the warps are opened, until the true shed is reached,

when the fork-projects the weft out from its docked position into the opened true shed.

2. Theshed-linding fork, in combination with its stand, and mechanism to retain the fork in its backward position, except at the time the true shed is being found, substantially as described.

3. The shed-findingfork, lever e, and link f, in combination with a leveradapted to press the fork-forward or toward the reed, and a' belt-shipping mechanism, substantially as described.

4. The lever g, controlled by the shed-findin g fork, bar. j, arm k, and lever t, in combination with the dagger,releasing-lever and shipper w, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.-

' GEO. OROMPTON.

Witnesses:

J. B. SYME,

J. A. WARE. 

